Solution to 2 GMAT Hard Math Questions | GMAT Number Properties | GMAT Data Sufficiency Tutorials | Online GMAT Course

This set of questions tests your conceptual understanding of Number Properties and Number Theory and its application to solve Number Theory Data Sufficiency questions. The video discusses two approaches for the first question – what one could do in the exam if one were to see such a question for the first time and second a more rigorous approach.

Question 1: 0:21
If P is a positive number, is (P^2 – 1) divisible by 12?
Statement 1: P is greater than 3.
Statement 2: P is prime.

Question 2: 13:31
If P is a positive number, is P prime?
Statement 1: (P+ 2) and (P + 4) are prime.
Statement 2: (P – 2) and (P – 4) are prime.

The correct answer for these questions are as follows:
Q1 | C; Q2 | C

For both the GMAT DS Sample questions, you need both statements together to answer the question asked.

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Comments are closed.

  1. Kalyan Biswal 2 years ago

    I thought i got both of them correct, but i failed again.
    I am loving these DS questions thanks

  2. saurabh dalela 2 years ago

    question 2 can be solved by if p is a decimal than also it can done

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